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(1/8)*(8*x-1) = 9/4-(7/4) // - 9/4-(7/4)
(1/8)*(8*x-1)-(9/4)+7/4 = 0
(1/8)*(8*x-1)-9/4+7/4 = 0
1/8*(8*x-1)-9/4+7/4 = 0
(1/8*4*(8*x-1))/4-9/4+7/4 = 0
1/8*4*(8*x-1)-9+7 = 0
4*x-19/2+7 = 0
4*x-5/2 = 0
(4*x-5/2)/4 = 0
(4*x-5/2)/4 = 0 // * 4
4*x-5/2 = 0
4*x-5/2 = 0 // + 5/2
4*x = 5/2 // : 4
x = 5/2/4
x = 5/8
x = 5/8
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